Das Verhalten von P₂J₄ in Lösung / The Behaviour of P₂l₄ in Solution

Abstract

The changes of 31 P nuclear magnetic resonance spectra of P2I4-CS2 solutions and of molecular weights of P2I4 in benzene with time have shown that in inert solvents a gradual disproportionation occurs with formation of PI3 . White Phosphorus, P4 , is not formed by this process. Instead the initially formed disproportionation product with higher Phosphorus content changes into a polymeric solid PnI by cleavage of PIS , which accounts for the increasing displacement of disproportionation equilibrium. The UV spectrum of P2I4 in n-Hexan is reported. The molar extinction coefficients indicate a considerable derealization of unshared electron pairs of the Phosphorus atoms.

Unexpected Reactivity of Red Phosphorus in Ionic Liquids

“…Thereby, a small amount of yellowish powder is formed (Figures 3 and 4 and Figure S9, Supporting Information) and a narrow line at δ = 50 ppm, which indicates phosphorus nanoparticles (vide supra), appears in the NMR spectrum. This resembles the observations by Carroll et al as well as Baudler et al who described an iodine‐containing colloidal phosphorus polymer as one of the dissociation products of P 2 I 4 in CS 2 4,16. On the basis of the linewidth, we estimate particle sizes of 22 ± 10 nm (cf.…”